<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>data初始化数据</title>
</head>
<body>
    <script src="/js/vue.js"></script>
    <div id ="app">
       <p>{{msg}}</p >
    </div>
    
    <script>
       var vm = new Vue({
         el:"#app",
         data:{
           msg:'初始数据'
         }
       })
       console.log('vm.$data.msg:'+vm.$data.msg)
       console.log('vm.msg'+vm.msg)
    </script> 
    
</body>
</html>